Introduce num-lanes and lane-speed-mantissa-gbps for devices operating in super-speed-plus. DWC_usb32 IP supports multiple lanes and can operate in different sublink speeds. Currently the device controller does not have the information of the phy's number of lanes supported. As a result, the user can specify them through these properties if they are different than the default setting. Signed-off-by: Thinh Nguyen <thinhn@xxxxxxxxxxxx> --- Documentation/devicetree/bindings/usb/dwc3.txt | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt index d03edf9d3935..4eba0615562f 100644 --- a/Documentation/devicetree/bindings/usb/dwc3.txt +++ b/Documentation/devicetree/bindings/usb/dwc3.txt @@ -86,6 +86,15 @@ Optional properties: - snps,quirk-frame-length-adjustment: Value for GFLADJ_30MHZ field of GFLADJ register for post-silicon frame length adjustment when the fladj_30mhz_sdbnd signal is invalid or incorrect. + - snps,num-lanes: set to specify the number of lanes to use. Valid inputs are + 1 or 2. Apply if the maximum-speed is super-speed-plus + only. Default value is 2 for DWC_usb32. For DWC_usb31, + it is always 1 at super-speed-plus. + - snps,lane-speed-mantissa-gbps: set to specify the symmetric lane speed + mantissa in Gbps. Valid inputs are 5 or 10. Apply if + the maximum-speed is super-speed-plus only. Default + value is 10. For DWC_usb31, it's always 10 at + super-speed-plus. - snps,rx-thr-num-pkt-prd: periodic ESS RX packet threshold count - host mode only. Set this and rx-max-burst-prd to a valid, non-zero value 1-16 (DWC_usb31 programming guide -- 2.11.0
